The Enemies of My Country: The Shadow Strike Series, Book 1 by Jason Kasper
Some quasi-military operatives try to disrupt a terrorist attack in the US. The book has action and suspense, but not much in originality. The terrorists are about to strike the area where the protagonist's family is (Charlottesville and DC) - right at the time when he is on the outs with his family and his employer. It feels like I've read the hyper-masculine story many times before. The "Spider Heist books by the author are much better.
The I Survved books are a series of fictional stories of people that experience some calamatis events in history. In this one, they witness the planes crashing into the twin towers in New York City. The kid has family in the fire department and gets a front door view of the terrorist act as well as the response.